/*
 * Copyright 2009 XueSong Guo.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.webwheel.utils;

/**
 * 浏览器重定向结果
 */
public class RedirectResult extends SimpleResult {

    private final String path;

    /**
     * 构造方法
     * @param path 重定向的地址
     */
    public RedirectResult(String path) {
        if(path==null || path.isEmpty()) path = "/";
        this.path = path;
    }

    /**
     * 获取重定向的地址
     * @return 重定向的地址
     */
    public String getPath() {
        return path;
    }

    /**
     * 通过{@link javax.servlet.http.HttpServletResponse#sendRedirect(String)}方法实现浏览器端重定向结果。
     * @throws Exception 任何异常
     */
    public void render() throws Exception {
        String path = this.path;
        if (path.startsWith("/")) {
            String contextPath = context.getRequest().getContextPath();
            if (!contextPath.isEmpty()) {
                path = contextPath + path;
            }
        }
        context.getResponse().sendRedirect(path);
    }
}
